Wed February 02, 2011 By: Suvrat Sharma

what is hydration enthalpies ?

Expert Reply
Wed February 02, 2011
Dear Student
Enthalpy of hydration o

f an ion is the amount of energy released when a mole of the ion dissolves in a large amount of water forming an infinite dilute solution in the process,

Mz+(g) + mH2O -------> Mz+(aq)

where Mz+(aq) represents ions surrounded by water molecules and dispersed in the solution. The approximate hydration energies of some typical ions are listed here. The table illustrates the point that as the atomic numbers increases, so do the ionic size, leading to a decrease in absolute values of enthalpy of hydration.


We hope that clarifies your query.
Mon April 17, 2017


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